I am going to extend at least 2-15 amp circuits to an outbuilding for exterior lighting. 1 circuit will be wired to existing carrage lights on the house, then I will be adding 2 carrage lights on the outbuilding so as to illuminate the house and outbuilding at the same time. The other circuit will be wired to existing spot lights under the soffits of the house which I plan on adding 2 spot lights on the outbuilding in the same manner to illuminate all flood lights with another switch.
I am using 2" PVC conduit buried at least 18" deep. Conduit run is about 50'. Am I allowed to use 1 larger conductor for each the neutral and ground to keep my conductor count down? I know my fill count good, I have plenty of room for expansion later. What I would like to know is if I can use a #10 conductor for a shared neutral, then another #10 for a shared ground? In other words: Can I size my shared conductors for the maximum load of all combined circuits and size accordingly? Or even If I were to run 2- #6awg THWN and use 1 for neutral and another for ground could I use them as neutrals and ground conductors for up to 4- 15 amp circuits since copper #6awg THWN is rated for up to 65amps?
1 - 14awg THWN hot conductor for each circuit. (2#14)
1 - 10awg THWN neutral shared (1#10)
1 - 10awg THWN ground shared (1#10)
I am using 2" PVC conduit buried at least 18" deep. Conduit run is about 50'. Am I allowed to use 1 larger conductor for each the neutral and ground to keep my conductor count down? I know my fill count good, I have plenty of room for expansion later. What I would like to know is if I can use a #10 conductor for a shared neutral, then another #10 for a shared ground? In other words: Can I size my shared conductors for the maximum load of all combined circuits and size accordingly? Or even If I were to run 2- #6awg THWN and use 1 for neutral and another for ground could I use them as neutrals and ground conductors for up to 4- 15 amp circuits since copper #6awg THWN is rated for up to 65amps?
1 - 14awg THWN hot conductor for each circuit. (2#14)
1 - 10awg THWN neutral shared (1#10)
1 - 10awg THWN ground shared (1#10)